Riveting tool

Abstract

The invention relates to a riveting tool for setting blind rivet nuts and/or blind rivet screws, comprising a drive piston which is able to be hydraulically adjusted from an initial position toward an end position, a pull rod which is releasably and operatively connected to the drive piston and which is able to be adjusted by the drive piston from a rivet receiving position into a setting position and a coupling element fixing the pull rod and a drawing mandrel to one another in the longitudinal axial direction. In order to provide a riveting tool of the type mentioned above by which uniform setting processes of rivets may be carried out with a high degree of repeated accuracy, it is provided that the riveting tool for fixing the setting position has an adjusting unit with a stroke-limiting element which is axially adjustable relative to the coupling element in the longitudinal axial direction of the pull rod, said stroke-limiting element being in engagement with the coupling element via a stop surface in the setting position.

We claim: 
     
       1. A riveting tool for setting blind rivet nuts and/or blind rivet screws, comprising
 a hydraulic drive piston adjustable from an initial position toward an end position in a longitudinal axial direction, 
 a pull rod which is releasably and operatively connected to the hydraulic drive piston and which is adjustable from a rivet receiving position into a setting position by movement of the hydraulic drive piston from the initial position toward the end position, 
 a coupling element fixing the pull rod and a drawing mandrel to one another in the longitudinal axial direction, and 
 an adjusting unit for fixing the setting position, wherein the adjusting unit comprises a stroke-limiting element which is axially adjustable relative to the coupling element in the longitudinal axial direction of the pull rod, wherein when the hydraulic drive piston is in the end position, said stroke-limiting element is in engagement with the coupling element via a stop surface of the coupling element. 
 
     
     
       2. The riveting tool according to  claim 1 , wherein the stroke-limiting element is configured as a stop sleeve having an external thread, said stop sleeve mounted fixedly in terms of rotation relative to the pull rod and adjustable in the longitudinal axial direction, said external thread engaged with an internal thread of an adjusting ring that is rotatably mounted on the riveting tool, such that rotation of the adjusting ring effects displacement of the stop sleeve. 
     
     
       3. The riveting tool according to  claim 1 , wherein the adjusting unit is releasably connected to a drive unit of the riveting tool. 
     
     
       4. The riveting tool according to  claim 3 , wherein the adjusting ring has latching marks for engaging one or more latching bodies on the drive unit. 
     
     
       5. The riveting tool according to  claim 2 , wherein the adjusting ring has an opening for viewing the stroke limiting element such that the position of the stroke limiting element is visible from the outside of the riveting tool. 
     
     
       6. The riveting tool according to  claim 1 , wherein the stroke-limiting element is displaceably mounted on at least one cylinder pin extending parallel to the pull rod in the longitudinal axial direction. 
     
     
       7. The riveting tool according to  claim 1 , wherein the adjusting unit has a base unit and a head piece, wherein the head piece is coaxially arranged relative to the coupling element and is releasably connected to the base unit via a quick-release connector. 
     
     
       8. The riveting tool according to  claim 7 , wherein the quick-release connector has a sliding sleeve which is pretensioned toward a latching position and which in the latching position engages with a latching element in a latching mark on the base unit. 
     
     
       9. The riveting tool according to  claim 7 , wherein the head piece comprises a setting head which is releasably connected to the head piece, wherein the setting head is coaxial with the drawing mandrel. 
     
     
       10. The riveting tool according to  claim 1 , wherein the coupling element has two half-shells coaxially arranged relative to the drawing mandrel and the pull rod, wherein a front face of said two half-shells faces the stop surface and is configured as a contact surface. 
     
     
       11. The riveting tool according to  claim 1 , wherein the hydraulic drive piston is pretensioned toward the initial position. 
     
     
       12. The riveting tool according to  claim 3 , wherein the adjusting unit is screwed to the drive unit of the riveting tool. 
     
     
       13. The riveting tool according to  claim 4 , wherein the latching bodies are on an adapter ring which is able to be fixed to the drive unit. 
     
     
       14. The riveting tool according to  claim 5 , wherein an edge of the adjusting ring adjacent to the opening comprises a scale configured for positioning the stroke-limiting element. 
     
     
       15. The riveting tool according to  claim 6 , wherein the at least one cylinder pin comprises two cylinder pins. 
     
     
       16. The riveting tool according to  claim 10 , wherein the front face of said two half-shells has a lubricant coating. 
     
     
       17. The riveting tool according to  claim 11 , wherein the drive piston is spring pretensioned toward the initial position. 
     
     
       18. A riveting tool for setting blind rivet nuts and/or blind rivet screws, comprising
 a hydraulic drive piston adjustable from an initial position toward an end position in a longitudinal axial direction, 
 a pull rod which is releasably and operatively connected to the hydraulic drive piston and which is adjustable from a rivet receiving position into a setting position by movement of the hydraulic drive piston from the initial position toward the end position, 
 a coupling element fixing the pull rod and a drawing mandrel to one another in the longitudinal axial direction, 
 an adjusting unit for fixing the setting position, wherein the adjusting unit comprises a stroke-limiting element which is axially adjustable relative to the coupling element in the longitudinal axial direction of the pull rod, wherein when the hydraulic drive piston is in the end position, said stroke-limiting element is in engagement with the coupling element via a stop surface of the coupling element, and 
 wherein the stroke-limiting element is configured as a stop sleeve having an external thread, said stop sleeve mounted fixedly in terms of rotation relative to the pull rod and adjustable in the longitudinal axial direction, said external thread engaged with an internal thread of an adjusting ring that is rotatably mounted on the riveting tool, such that rotation of the adjusting ring effects displacement of the stop sleeve. 
 
     
     
       19. A riveting tool for setting blind rivet nuts and/or blind rivet screws, comprising
 a hydraulic drive piston adjustable from an initial position toward an end position in a longitudinal axial direction, 
 a pull rod which is releasably and operatively connected to the hydraulic drive piston and which is adjustable from a rivet receiving position into a setting position by movement of the hydraulic drive piston from the initial position toward the end position, 
 a coupling element fixing the pull rod and a drawing mandrel to one another in the longitudinal axial direction, 
 an adjusting unit for fixing the setting position, wherein the adjusting unit comprises a stroke-limiting element which is axially adjustable relative to the coupling element in the longitudinal axial direction of the pull rod, wherein when the hydraulic drive piston is in the end position, said stroke-limiting element is in engagement with the coupling element via a stop surface of the coupling element, and 
 wherein the stroke-limiting element is a stop sleeve having an external thread, said stop sleeve mounted fixedly in terms of rotation relative to the pull rod and adjustable in the longitudinal axial direction, said external thread engaged with an internal thread of an adjusting ring that is rotatably mounted on the riveting tool, such that rotation of the adjusting ring effects displacement of the stop sleeve, 
 wherein the adjusting unit is releasably connected to a base housing of the drive unit by an adapter ring, said adapter ring having a thread at an end that is adapted to the base housing of the drive unit, and said adapter ring having a thread at another end that is adapted to the adjusting unit.